9. The ribosome is a complex made up of: A) Proteins and oligosaccharides. B) De
ID: 71420 • Letter: 9
Question
9. The ribosome is a complex made up of:
A) Proteins and oligosaccharides.
B) Deoxyribonucleic acid and polypeptides.
C) rRNA, DNA, mRNA and protein.
D) tRNA, mRNA and proteins
E) Proteins and rRNA.
10. What property of Taq polymerase makes it ideal for use in the Polymerase Chain Reaction;
A) can synthesize DNA faster that other DNA polymerases.
B) can synthesize DNA without the addition of a primer sequence.
C) does not get denatured and loose function at high temperatures.
D) can unwind DNA duplex before synthesis.
E) does not pass stop codons.
11. A wild-type looking fruitfly (red eyes and grey body color) has a genotype that is heterozygous for a brown eye color trait and black body trait, is test crossed with a brown eye fly with black body color (homozygous recessive for both). The offsprings have the following phenotypic distribution: wild-type=190; brown eye-black body=210; brown eye-grey body=16; red eye-black body=24. The recombination frequency between yellow and short wings is:
A) 4%
B) 6%
C) 9%
D) 10%
E) 16%
12. A possible sequence of nucleotides in the template strand of DNA that would code for the polypeptide sequence phe-leu-ile-val would be (please consult codon table provided on the last page of the test):
A) 5' TTG-CTA-CAG-TAG 3'.
B) 3' AAA-GAA-TAA-CAA 5'.
C) 5' AUG-CTG-CAG-TAT 3'.
D) 3' AAA-AAT-ATA-ACA 5'.
E) 3' AAC-GAC-GTC-ATA 5'
13. Accuracy in the translation of mRNA into the polypeptide sequence depends on specificity in the
A) binding of ribosomes to mRNA.
B) shape of the A and P sites of ribosomes.
C) binding of the tRNA anticodon to the mRNA codon.
D) attachment of amino acids to tRNAs.
E) both C and D
26. In the Polymerase Chain Reaction (PCR) which of the following best describes the complete sequence of steps occurring during every cycle?
1. The primers hybridize to the target DNA.
2. The mixture is heated to a high temperature to denature the double stranded target DNA.
3. Fresh helicase and DNA polymerase is added.
4. Taq DNA polymerase extends the primers to make a copy of the target DNA.
A) 4, 1, 2
B) 1, 3, 2, 4
C) 3, 4, 1,
D) 1, 4, 2
E) 2, 1, 4
Explanation / Answer
Answer:
Q9). E
Q10). C
Q11). C
Q12). B
Q13). E
Q26). E
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